HRID248248
反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
PROCEDURE
实验过程
To a solution of 17-ethyl-1-hydroxy-12-[2'-(3",4"-dihydroxycyclohexyl)-1'-methylvinyl]-23,25-di-methoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9 ]octacos-18-ene-2,3,10,16-tetraone (200 mg, Example 38) in ether (6 ml) is added borontrifluoride etherate (10 μl) followed by freshly prepared diazoethane (100 fold excess). The mixture is stirred at room temperature for 15 min and quenched with sat'd aqueous sodium bicarbonate solution. The organic layer is separated, washed (sat'd aqueous NaCl) and dried over anhydrous magnesium sulfate. Removal of solvent followed by preparative tlc on silica to separate the regioisomers gives the title compound.
WORKUP
后处理
- customquenched with sat'd aqueous sodium bicarbonate solution
- customThe organic layer is separated
- washwashed (sat'd aqueous NaCl)
- dry with materialdried over anhydrous magnesium sulfate
- customRemoval of solvent
- customto separate the regioisomers